<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="js/jquery-3.2.1.min.js"></script>
</head>
<body>
	<head>
    		<meta charset="UTF-8">
    		<title>创建新元素</title>
    	</head>
       <script>
           $(function(){
               //创建<div>元素节点
               $("body").append("<div></div>");
               $("div").html("Hello World!");
           })
       </script>
</body>
</html>